You have the Elektrocution record shop on the rue des Pierres (center of Brx) and apparantly there's also a Hard Rock Market (Rue des éperonniers), but never been to that one. If you are up for a trip you can go to Bruges (1h with train) to visit the historical areas and go to the wall of sound shop (good selection of music and nice place to get a beer).

To visit Brx I recommend going to tourist info center and ask for a "use-it" map. It offers alternative suggestions for things to do/eat/etc in Brx.

I'd like to know if there are any food shops in the area of the MG4, because i've never been able to find one closeby.